<template>
	<view>
		<!-- 自定义搜索组件 -->
		<!-- <my-search bgcolor="black" radius="3"></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		<!-- 滑动区域 -->
		<view class="scroll-view-container">
			<!-- 左侧滑动区域 -->
			<view class="left-scroll-view">
				<scroll-view scroll-y="true" :style="{height:wh+'px'}">
					<block v-for="(item, i) in cateList" :key="i">
						<view :class="['left-scroll-view-item',i === active ? 'active' : '']" @click="activeChanged(i)">{{item.cat_name}}</view>
					</block>
				</scroll-view>
			</view>
			<!-- 右侧滑动区域 -->
			<view class="right-scroll-view">
				<scroll-view scroll-y="true" :style="{height:wh+'px'}" :scroll-top="scrollTop">
					<view class="cate-lv2" v-for="(item2, i2) in cateLev2" :key="i2">
						<!-- 二级分类标题 -->
						<view class="cate-lv2-title" v-if="item2.children">/{{item2.cat_name}}/</view>
						<!-- 三级分类列表 -->
						<view class="cate-lv3-list">
							<view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
								<image :src="item3.cat_icon"></image>
								<text>{{item3.cat_name}}</text>
							</view>
						</view>
					</view>
				</scroll-view>
			</view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				wh:0,
				//分类项数据
				cateList:[],
				active:0,
				//二级分类数据
				cateLev2:[],
				scrollTop:0
			};
		},
		onLoad(){
			const SysInfo = uni.getSystemInfoSync()
			this.wh = SysInfo.windowHeight - 50
			this.getCateList()
		},
		methods:{
			//https转成http
			toHttp(url){
				return url.replace(/https:\/\//g,'http://')
			},
			async getCateList(){
				const {data:res} = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !== 200) return uni.$showMsg()
				res.message.forEach(lev1=>{
					lev1.children.forEach(lev2=>{
						lev2.children && lev2.children.forEach(lev3=>{
							lev3.cat_icon = this.toHttp(lev3.cat_icon)
						})
					})
				})
				this.cateList = res.message
				this.cateLev2 = res.message[0].children
			},
			activeChanged(i){
				this.active = i
				this.cateLev2 = this.cateList[i].children
				this.scrollTop = this.scrollTop == 0 ? 1 : 0
			},
			gotoGoodsList(item3){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item3.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:"/subpkg/search/search"
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
	
	.left-scroll-view{
		width: 120px;
		.left-scroll-view-item{
			background-color: #f7f7f7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			&.active{
				background-color: #ffffff;
				position: relative;
				&::before{
					content: ' ';
					display: block;
					width: 3px;
					height: 30px;
					background-color: #c00000;
					position: absolute;
					left: 0;
					top: 50%;
					transform: translateY(-50%);
				}
			}
		}
	}
	.right-scroll-view{
		width: 100%;
		.cate-lv2-title{
			font-weight: bold;
			font-size: 12px;
			text-align: center;
			padding: 15px 0;
		}
		.cate-lv3-list{
			display: flex;
			flex-wrap: wrap;
			.cate-lv3-item{
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				margin-bottom: 10px;
				width: 33.33%;
				image{
					width: 60px;
					height: 60px;
				}
				text{
					font-size: 12px;
				}
			}
		}
	}
}
</style>
